JP7098215B2 - How to assemble joints and guide members - Google Patents

Description

The present invention relates to a method of assembling a joint and a guide member.

Conventionally, as a joint used for a water supply pipe in a house or a hot water supply pipe, a joint that can be connected with one touch by simply inserting a resin pipe into the joint has been known (see, for example, Patent Document 1).

The joint described in Patent Document 1 is provided with an insertion gap into which the tip end portion of the pipe is inserted. A resin guide (insertion guide) is installed on the inner surface of the insertion gap to seal the gap with the pipe and guide the insertion of the tip of the pipe to be inserted into the joint.

The guide (10) is inserted into the gap (G) between the inner cylinder (3) installed in the joint and the outer cylinder (4) attached to the outside of the inner cylinder (3). It is provided in the joint body (1) by snap-fitting the cap (6) to the outer cylinder (4).

Japanese Unexamined Patent Publication No. 2012-52574

However, in the pipe joint described in Patent Document 1, each component is firmly fixed to each other so as not to leak water. Therefore, if the guide (10) is forgotten to be assembled in the pipe joint at the time of assembly, it is difficult to retrofit the guide (10).

Further, even if the pipe joint is a pipe joint in which the outer cylinder (4), the cap (6), etc. are formed into a nut (square) shape and can be disassembled, when the guide (10) is retrofitted, the guide (10) or the like is used. Alignment is required, and it is a troublesome structure to retrofit the guide (10).

An object of the present invention is to provide a joint and a method for assembling a guide member to which a guide member can be easily retrofitted.

In order to solve the above problems, in the present invention, a cylindrical joint body extending in the axial direction and an outer peripheral portion of the joint body on one side in the axial direction are fitted with a cylindrical cover member interposed therebetween. A joint having a cylindrical cap, and having a cylindrical guide insertion space between the outer peripheral portion on one side in the axial direction of the joint body and the cover member and the cap. The cap has a connecting portion connected to the cover member and an opening having an inner diameter smaller than that of the connecting portion, and is pushed into the opening at the inner opening edge of the opening. The cap locking portion of the annular guide member is arranged so as not to be movable outward in the axial direction and movable inward in the axial direction, and is arranged between the outer peripheral surface of the guide member and the opening. The lid projection installation space is formed, and the locking projection portion of the lid that closes the opening is detachably inserted into the lid projection installation space .

The present invention can provide a joint and a method for assembling a guide member to which a guide member can be easily retrofitted.

It is an enlarged sectional view of the joint which concerns on this invention. (A) is an enlarged cross-sectional view showing a state when the guide member and the lid are disassembled, and (b) is an enlarged cross-sectional view showing a state when the guide member and the lid are assembled. It is an exploded enlarged sectional view which shows the state when a guide member and a lid body are attached to a joint. It is sectional drawing which shows the state when a guide member and a lid body are attached to a joint. It is sectional drawing which shows the state when the lid body is detached after attaching a guide member and a lid body to a joint. It is sectional drawing which shows the state when a pipe is inserted into a joint. It is sectional drawing which shows the state when a guide member passes a seal member installation position by a pipe inserted into a joint. It is sectional drawing which shows the state when the pipe is inserted and connected to the predetermined position in a joint.

The method of assembling the joint 100 and the guide member 6 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 8. When explaining the direction, the threaded portion 1b side of the joint body 1 shown in FIG. 1 will be described as the front side (the other side), and the lid body 7 side will be described as the rear side (one side).

<Joining>
The joint 100 shown in FIG. 1 is a pipe joint for connecting a pipe 8 (see FIG. 8) such as a water supply pipe or a hot water supply pipe in a house or the like. The joint 100 includes a joint main body 1, a cover member 2, a cap 3, a stopper 4, a seal member 5, a guide member 6, a lid 7, a guide insertion space S1, and a lid protrusion installation space S2. And is configured with.

<Joint body>
The joint body 1 is made of a metal such as a copper alloy extending in the axial direction, or a tubular member made of a resin such as polyphenylene sulfide (PPS). The joint body 1 is formed with a water passage hole 1g whose diameter is reduced from the front side to the rear side on the axis core line. A screw portion 1b, a square engaging portion 1c, a cover member mounting portion 1d, a space forming portion 1e, and a seal member installation groove 1f are formed on the outer peripheral portion 1a of the joint body 1 in this order from the front side.

The threaded portion 1b shown in FIG. 1 is a male threaded portion screwed into a female threaded portion formed on a mounting member (not shown) for mounting the joint 100.
The square engaging portion 1c is a portion where a tool such as a spanner is engaged when the screw portion 1b is screwed into the female screw portion of the mounting member (not shown).
The cover member mounting portion 1d is a concave portion to which the cover member 2 is mounted by engaging the engaging convex portion 2a formed inside the front end portion of the cover member 2.

The space forming portion 1e is a stepped portion that forms an inner wall (wall surface on the joint body side) of the guide insertion space S1. A cover member 2, a cap 3, a guide member 6, and a locking protrusion 7a of the lid 7 are arranged in the space forming portion 1e.
The seal member installation groove 1f is an annular groove in which the seal member 5 is installed. The seal member installation groove 1f is composed of a plurality of grooves formed at a substantially central portion of the space forming portion 1e with appropriate intervals.

<Cover member>
As shown in FIG. 1, the cover member 2 is a tubular member for forming the outer wall of the guide insertion space S1 and for installing the cap 3 and the stopper 4. The cover member 2 is formed with the above-mentioned engaging convex portion 2a, a guide insertion space forming portion 2b, a cap mounting portion 2c, and a stopper mounting portion 2d. The cover member 2 is formed of, for example, a transparent member such as a resin such as polyamide (PA), and the seal member 5, the guide member 6, and the pipe 8 (see FIG. 8) are installed inside the cover member 2. Is in a state where it can be visually recognized from the outside.

The guide insertion space forming portion 2b is a stepped surface that forms the outer wall of the guide insertion space S1. The guide insertion space forming portion 2b is formed on the rear inner surface of the cover member 2.
The cap mounting portion 2c is an engaging portion to which the connecting portion 3a of the cap 3 is connected. The cap mounting portion 2c is formed in an uneven shape on the rear outer peripheral surface of the cover member 2 in a cross-sectional view.
The stopper mounting portion 2d is an engaging portion to which the stopper 4 is mounted. The stopper mounting portion 2d is formed in a substantially triangular shape in a cross-sectional view on the rear end portion of the cover member 2.

<Cap>
As shown in FIG. 1, the cap 3 is a tubular end cap in which a cylindrical cover member 2 is interposed in an outer peripheral portion 1a on one side in the axial direction of a joint body 1 and fitted externally by snap fitting. .. The cap 3 is made of a resin such as polyacetal (POM). The cap 3 has a connecting portion 3a, an opening 3b, an inner opening edge 3c, and an outer opening edge 3d.

The connecting portion 3a is an engaging portion connected to the cover member 2. The connecting portion 3a is formed in a concave-convex shape in a cross-sectional view at a portion near the front side of the inner surface of the cap 3.
The opening 3b is an inner crossguard having an inner diameter smaller than that of the connecting portion 3a. That is, the opening 3b is a thick plate-shaped portion formed so as to project from the rear end portion of the tubular cap 3 toward the axial core line.

In the inner opening edge 3c, the cap locking portion 6a of the annular guide member 6 is arranged so as not to be movable outward in the axial direction (rear direction side) and movable inward in the axial direction (front direction side). This is the front end portion (inner end portion) of the opening 3b.
The outer opening edge 3d is an end surface to which the front surface 7c of the lid 7 comes into contact when the lid 7 is attached to the opening 3b.

<Guide insertion space>
As shown in FIG. 1, the guide insertion space S1 is a space (gap) formed in a cylindrical shape between the outer peripheral portion 1a on one side in the axial direction of the joint body 1 and the cover member 2 and the cap 3. be.

<Cover protrusion installation space>
The lid protrusion installation space S2 is a space (gap) formed between the outer peripheral surface 6b of the guide member 6 and the opening 3b. A locking protrusion 7a of the lid 7 that closes the opening 3b is detachably inserted into the lid protrusion installation space S2.

<Stopper>
The stopper 4 is made of, for example, a metal annular plate member such as stainless steel (SUS) for a spring. The stopper 4 is formed in a substantially C shape (dogleg shape) in a cross-sectional view, and is mounted on the stopper mounting portion 2d from the rear side. When the pipe 8 (see FIGS. 7 and 8) is inserted into the joint 100, the outer peripheral surface of the pipe 8 is in sliding contact with the radial inner end of the stopper 4.

<Seal member>
As shown in FIG. 1, the seal member 5 (51, 52) is composed of, for example, two annular O-rings (rubber packings) arranged at appropriate intervals. The seal member 5 is engaged with the seal member installation groove 1f of the outer peripheral portion 1a of the joint body 1 facing the guide insertion space S1 so that the radial inner end portion protrudes from the seal member installation groove 1f. The sealing member 5 is made of a rubber material such as ethylene propylene diene rubber (EPDM). When the pipe 8 (see FIGS. 7 and 8) is inserted into the joint 100, the seal member 5 is in sliding contact with the widened inclined surface 6c of the guide member 6 and the outer peripheral surface of the pipe 8.

<Guide member>
As shown in FIGS. 6 to 8, the guide member 6 is made of polypropylene (PP) or the like that guides the insertion of the pipe 8 when the front end portion of the pipe 8 is inserted into the guide insertion space S1 of the joint 100 and connected. It is an annular member made of resin. As shown in FIG. 2A, the guide member 6 is formed with a cap locking portion 6a, an outer peripheral surface 6b, an expansion inclined surface 6c, a claw portion 6d, and a recess 6f. As shown in FIG. 7, the guide member 6 is formed by expanding in the back side direction of the guide insertion space S1, and when the guide member 6 is pushed in the back side direction of the guide insertion space S1, the seal is formed. It has an expanded inclined surface 6c that abuts on the member 5, and has a function of preventing the seal member 5 from sticking out.

As shown in FIG. 2A, the cap locking portion 6a is a portion formed in a locking claw shape to be locked to the inner opening edge 3c of the cap 3. The cap locking portion 6a is projected from the outer front end portion of the guide member 6.

The outer peripheral surface 6b is a portion that is detachably attached to the locking protrusion 7a of the lid 7. At the rear end of the outer peripheral surface 6b, an annular recess 6f with which the annular convex portion 7b of the lid 7 is engaged is formed. Therefore, by pushing the guide member 6 into the annular locking protrusion 7a, the claw portion 6d is engaged with the convex portion 7b and can be attached and detached.

When the guide member 6 is pushed into the back side of the guide insertion space S1 by the pipe 8, the widened inclined surface 6c is gradually pressed against the seal member 5 so that the pipe 8 can be smoothly inserted. It is a guide surface of.

The claw portion 6d is projected from the outer peripheral end portion of the substantially cylindrical guide member 6 on the lid 7 side.
The concave portion 6f is an annular groove with which the convex portion 7b is engaged. The recess 6f is adjacent to the cap locking portion 6a side of the claw portion 6d and is formed along the claw portion 6d.

<Cover>
The lid 7 is a closed body for preventing dust and the like from entering the guide insertion space S1 when the joint 100 is not used. The lid 7 is formed with a locking protrusion 7a, a convex portion 7b, and a front surface 7c. The lid 7 is made of a substantially disk-shaped member made of a resin such as polypropylene (PP).

The locking projection 7a is an annular projection formed so as to project from the front surface of the lid 7. A convex portion 7b is formed on the inner wall of the locking protrusion 7a.
A concave portion 6f formed on the outer peripheral surface 6b of the guide member 6 is detachably engaged with the convex portion 7b.
The front surface 7c is a portion to be applied to the outer opening edge 3d of the cap 3 when the lid 7 is attached to the joint 100.

<Piping>
The pipe 8 shown in FIG. 8 is mainly made of resin such as a cross-linked polyethylene pipe or a polybutene pipe, but is made of a metal or an aluminum three-layer pipe in which the inside and the outside of an aluminum tubular are coated with resin or the like. May be.

[Action]
Next, with reference mainly to FIGS. 2 to 8, the operation of the method of assembling the joint 100 and the guide member 6 according to the embodiment of the present invention will be described in terms of assembling order.

In the guide member 6 shown in FIG. 2A, the concave portion 6f is snap-fitted to the convex portion 7b of the lid 7 in advance, and is integrated with the lid 7 as shown in FIG. 2B. ..

As shown in FIG. 3, the joint 100 is first attached to the joint main body 1 to which the seal member 5 is attached by pushing it into the cover member 2. Next, the stopper 4 is engaged with the stopper mounting portion 2d of the cover member 2, the connecting portion 3a of the cap 3 is pushed into the cap mounting portion 2c, and the cap 3 is mounted on the cover member 2. The joint 100 assembled in this way is attached to the installation location by screwing the screw portion 1b to the female screw portion (not shown) provided at the installation location.

When the pipe 8 (see FIG. 8) is not connected to the joint 100, the cap locking portion 6a of the guide member 6 attached to the lid 7 is pushed into the opening 3b as shown in FIGS. 3 and 4. The guide member 6 and the lid 7 are assembled to the joint 100 by locking the guide member 6 to the inner opening edge 3c. Since the opening 3b is closed by the lid 7, it is possible to prevent dust and the like from entering the joint 100. Further, since the guide member 6 has a structure that cannot be attached to the joint 100 without the lid body 7, it is possible to eliminate forgetting to assemble the guide member 6 to the joint 100.

When assembling the pipe 8 (see FIG. 8) to the joint 100, first, as shown in FIG. 5, the lid 7 is separated from the guide member 6 and pulled out from the inside of the opening 3b. In this way, since the lid 7 can be attached to the joint 100 just before the pipe 8 is attached, it is possible to prevent dust and foreign matter from entering the joint 100 and adhering to the seal member 5. ..

Next, as shown in FIG. 6, the tip end portion of the pipe 8 is inserted into the opening 3b, and the guide member 6 is pushed in. Then, as shown in FIG. 7, the guide member 6 pushed into the pipe 8 expands the radial inside of the stopper 4 at the cap locking portion 6a, and presses the expanded inclined surface 6c against the seal member 5. While being compressed, it slides toward the back side (front side) of the guide insertion space S1 and is pushed to the front end of the guide insertion space S1 as shown in FIG. Therefore, the guide member 6 can be easily retrofitted to a predetermined position of the joint 100 without having to align the guide member 6 at the time of assembly.

The pipe 8 inserted into the guide insertion space S1 is connected to the joint 100 in a state where the two sealing members 5 are in close contact with each other on the inner wall surface and the stopper 4 is in close contact with the outer peripheral surface.
In this case, the cover member 2 is formed of a transparent member, and it is possible to visually recognize the installed state of the seal member 5, the guide member 6 and the pipe 8 inside the cover member 2, and to confirm the mounting defect. ..

As shown in FIG. 1, in the joint 100 according to the present embodiment, a cylindrical joint main body 1 extending in the axial direction and a cylindrical cover member on the outer peripheral portion 1a on one side in the axial direction of the joint main body 1 are covered with a cylindrical cover member. It is provided with a cylindrical cap 3 interposed therebetween and fitted, and is formed in a cylindrical shape between the outer peripheral portion 1a on one side in the axial direction of the joint body 1 and the cover member 2 and the cap 3. In the joint 100 having the guide insertion space S1, the cap 3 has a connecting portion 3a connected to the cover member 2 and an opening 3b having an inner diameter smaller than that of the connecting portion 3a. On the inner opening edge 3c of 3b, the cap locking portion 6a of the annular guide member 6 pushed into the opening 3b is arranged so as not to be movable outward in the axial direction and movable inward in the axial direction. Will be done.

According to this configuration, on the inner opening edge 3c of the opening 3b, the cap locking portion 6a of the annular guide member 6 is arranged so as not to be movable outward in the axial direction and movable inward in the axial direction. By doing so, the guide member 6 can be easily retrofitted to the joint 100 after the joint 100 is assembled. Therefore, the present invention solves the problem that it is difficult to retrofit the guide (10) when the guide (10) is forgotten to be assembled in the pipe fitting at the time of assembling the joint. , The assembling property of the joint 100 can be improved. Further, since the guide member 6 arranged in the opening 3b is immovably arranged outside in the axial direction, it can be retrofitted without coming out of the opening 3b.

Further, as shown in FIG. 1, a lid protrusion installation space S2 is formed between the outer peripheral surface 6b of the guide member 6 and the opening 3b, and the opening 3b is provided in the lid protrusion installation space S2. The locking projection 7a of the lid 7 to be closed is detachably inserted and attached.

According to such a configuration, the locking protrusion 7a of the lid 7 that closes the opening 3b is detachably inserted into the lid protrusion installation space S2, so that the opening 3b can be easily inserted by the lid 7. Can be blocked. Therefore, when the pipe 8 is not attached to the joint 100, the opening 3b can be closed by the lid 7 to prevent dust and the like from entering the joint 100.

Further, as shown in FIGS. 2A and 2B, a convex portion 7b is formed on the inner wall of the locking protrusion 7a, and the convex portion 7b is formed on the outer peripheral surface 6b of the guide member 6. The recess 6f is detachably locked.

According to such a configuration, since the concave portion 6f of the guide member 6 is detachably locked to the convex portion 7b, the lid body 7 can be detachably attached to the joint 100.

Further, a seal member 5 is provided on the outer peripheral portion 1a of the joint body 1 facing the guide insertion space S1, and the guide member 6 is formed by expanding in the back side direction of the guide insertion space S1. It has an expanded inclined surface 6c that comes into contact with the seal member 5 when the guide member 6 is pushed toward the back side of the guide insertion space S1.

According to such a configuration, since the guide member 6 has an expanded inclined surface 6c having an oblique shape that abuts on the seal member 5, the guide member 6 is pushed into the guide insertion space S1 by the pipe 8 and arranged on the back side. Even if the seal member 5 is installed, the expanded inclined surface 6c gradually and strongly abuts on the seal member 5, so that it is easy to push in. Therefore, since the seal member 5 is pushed by the widened inclined surface 6c of the guide member 6 and gradually deformed, the insertion resistance of the guide member 6 does not change abruptly, so that the seal member 5 is not easily damaged and is not easily damaged. ) Allows smooth insertion.

Further, as shown in FIGS. 1 or 2 (a) and 2 (b), a method of assembling a guide member 6 for assembling the guide member 6 to the joint 100, wherein the guide member 6 is a lid that closes the opening 3b. By pushing the locking protrusion 7a into the opening 3b in a state where the locking protrusion 7a is detachably fitted and integrated into the inner wall surface of the locking protrusion 7a, the cap locking portion 6a is inserted as a guide. It is immovably arranged outward in the axial direction in the space S1.

According to such a configuration, after assembling the joint 100, the guide member 6 is retrofitted into the guide insertion space S1 in the joint 100 by pushing the locking protrusion 7a of the lid 7 into the opening 3b. be able to. The guide member 6 and the lid 7 can be positioned at a predetermined position by integrating the guide member 6 and locking the guide member 6 to the lid 7 so as not to move outward in the axial direction in the joint 100. The guide member 6 is immovably arranged outward in the axial direction and can be retrofitted without being separated from the lid 7.

Further, the guide member 6 is arranged so as to be movable inward in the axial direction by separating the lid body 7.
According to such a configuration, the guide member 6 having the cap locking portion 6a locked to the opening 3b is separated from the lid 7 arranged in a state of being integrated outward in the axial direction with the opening 3b interposed therebetween. By doing so, it becomes possible to move inward in the axial direction. When the guide member 6 is moved outward in the axial direction, the cap locking portion 6a is locked to the inner opening edge 3c of the opening 3b and the movement to the outside in the axial direction is restricted, so that the inside of the opening 3b is restricted. Never get out of.

[Modification example]
The method of assembling the joint 100 and the guide member 6 according to the present embodiment has been described in detail with reference to the drawings, but the present invention is not limited thereto and does not deviate from the gist of the present invention. Can be changed as appropriate.

For example, the concave portion 6f of the guide member 6 and the convex portion 7b of the lid 7 shown in FIG. 2A are not limited to those formed in an annular shape, and a plurality of portions arranged at appropriate intervals are not limited. It may be a thing.
Further, the guide member 6 and / or the lid 7 may be split.
Further, in the guide member 6 and the lid 7, the concave portion and the convex portion (snap fitting) may be in the reverse combination.

As shown in FIGS. 7 and 8, the guide member 6 arranged inside the transparent cover member 2 is colored by coloring or the like so that the inserted state of the guide member 6 and the pipe 8 can be easily confirmed. can do.

The cover member mounting portion 1d and the engaging convex portion 2a shown in FIG. 1 may be formed by screw grooves that are screwed together so that the cover member 2 can be mounted on the joint body 1.
Further, the connecting portion 3a and the cap mounting portion 2c may have a screw shape that engages with each other.

1 Joint body 1a Outer peripheral part 2 Cover member 3 Cap 3a Connecting part 3b Opening part 3c Inner opening edge 5 Sealing member 6 Guide member 6a Cap locking part 6b Outer peripheral surface 6c Expanded inclined surface 6f Recessed part 7 Cover body 7a Locking protrusion 7b Convex part 100 Joint S1 Guide insertion space S2 Closure protrusion installation space

Claims (5)

Cylindrical joint body extended in the axial direction and
A cylindrical cap, which is fitted on the outer peripheral portion on one side in the axial direction of the joint body with a cylindrical cover member interposed therebetween, is provided.
A joint having a cylindrical guide insertion space between the outer peripheral portion on one side in the axial direction of the joint body and the cover member and the cap.
The cap has a connecting portion connected to the cover member and a connecting portion.
It has an opening having an inner diameter smaller than that of the connecting portion, and has an inner diameter.
On the inner opening edge of the opening, a cap locking portion of the annular guide member pushed into the opening is arranged so as not to be movable outward in the axial direction and movable inward in the axial direction .
A lid protrusion installation space is formed between the outer peripheral surface of the guide member and the opening.
A locking protrusion of the lid that closes the opening is detachably inserted into the lid protrusion installation space .
Featuring a fitting. A convex portion is formed on the inner wall of the locking protrusion.
A concave portion formed on the outer peripheral surface of the guide member is detachably locked to the convex portion.
The joint according to claim 1 . A sealing member is provided on the outer peripheral portion of the joint body facing the guide insertion space.
The guide member is formed by expanding toward the back side of the guide insertion space, and when the guide member is pushed toward the back side of the guide insertion space, the expansion abuts on the seal member. Having an inclined surface,
The joint according to claim 1 or 2 . A method of assembling a guide member for assembling the guide member to the joint according to any one of claims 1 to 3 .
The guide member is detachably fitted and integrated with the inner wall surface of the locking protrusion of the lid that closes the opening, and the locking protrusion is pushed into the opening. The cap locking portion is arranged so as not to be movable outward in the axial direction in the guide insertion space.
A method of assembling a guide member. The guide member is arranged so as to be movable in the axial direction by separating the lid body.
The method for assembling the guide member according to claim 4 .

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